Sleeve or bushing for holding bobbins firmly on the pins of pin trays



G. M EE 2;532,1l4 s VE 0R BUSHING F HOLDING BOBBINS IRMLY ON THE PI F ITRAYS Filed Jul 1 Nov. 28, 1950 Patented Nov. 28, 1950 UNITED STATES iA'ENT OFFICE SLEEVE OR BUSHING FOR HOLDING BOB- BINS FIRMLY ON THE PINSOF PIN TRAYS Application July 8, 1947, Serial No. 7 59,638

7 Claims.

This invention relates to sleeves or bushings, and has particularreference to sleeves or bushings to be applied to the pins of bobbinholding pin trays to hold bobbins mounted on the pins againstundesirable movements relative thereto.

In the textile industry it is common to employ pin trays to holdnumerous bobbins to facilitate their handling. The bobbins have axialbores and the pin trays have numerous upstanding bore-entering pins uponwhich the bobbins are mounted. Usually the bores of the bobbins are ofconsiderably greater diameter than the pins and as a consequence thebobbins are engaged quite loosely on the pins, with the result that theyare free to tilt and rotate relative thereto. During handling of thetrays the bobbins commonly tilt and rotate with the result that the yarnoften sloughs off of some or all of the'same and thereby causescomplications.

Accordingly, the general object of the present invention is to providesimple, practical means which does not interfere with ready applicationof bobbins to, and their removal from, the pins of pin trays, and whichyet act effectively to hold the bobbins firmly engaged with the pinsagainst their accidental removal therefrom and particularly against anytilting or rotary movements relative thereto whereby sloughing off ofyarn from the bobbins is effectively avoided.

More particularly, a special and important object of the invention is toprovide means for the purpose stated in the form of simple sleeves orbushings to be engaged on the pins of pin trays and to be receivedneatly in the bores of the bobbins and which do not require anyalteration of the pins or of the bobbins to accomplish their purpose.

Another special and important object of -the invention is so toconstruct the sleeves or bushings that they are held frictionally yetsecurely be hereinafter more fully described, illustrated'in theaccompanying drawings and defined in the appended claims.

In the accompanying drawings, wherein like characters of referencedenote corresponding 'nart in related views:

Fig. 1 is a perspective view .of a portion of a bobbin holding pin trayshowing a bobbin mounted on one of the pins thereof in accordance withthe invention.

Fig. 2 is a side elevation on an enlarged scale of a pin of a bobbinholding pin tray provided with a head and a sleeve or bushing inaccordance with the invention and illustrating a portion of a bobbinpartially engaged on said pin.

Fig. 3 is an enlarged perspective view of the sleeve or bushing shown inFig. 2.

Fig. 4 is a side elevation of a sleeve or bushing of alternative formshown as applied to a pin of a bobbin holding pin tray; and

Fig. 5 is a top plan view of the sleeve or bushing shown in Fig. 4.

Referring to the drawings in detail, first to the embodiment of theinvention illustrated in Figs. 1 to 3, and particularly with referenceto Fig. 1, A designates, generally, a portion of a bobbin holding pintray of a known type which includes cross wires or rods l'il havingbobbin holding pins l l welded orotherwise fixed thereto and risingtherefrom; B designates, generally, a sleeve or bushing formed inaccordance with one practical embodiment .of the invention and engaged.on one of the pins ii, and C designates, generally, a bobbin of a knowntype, engaged on said pin i l and held firmly thereon by said sleeve orbushing B.

The sleeve or bushing B is formed from suitable inherently resilientmaterial such as rubber, synthetic rubber or the like, and has extendingaxially therethrough an opening l2 adapting the same to be slid onto thepin H. The opening I2 is of slightly lesser normal diameter than the pinl l and as .a consequence, when said sleeve .or bushing is slid ontosaid pin, said sleeve or bushing is slightly expanded and, by itsconstant tendency thereafter to contract, is retained frictionally andfirmly on said pin as well as against any rotary or tilting movementrelative thereto.

The bobbin C has extending axially therethrough an opening l3 whichaccommodates the pin it and the sleeve or bushing B, andexteriorly saidsleeve or bushing is of slightly greater normal diameter, eitherthroughout its length, or throughout one or more portions of its length,than the diameter of the opening 13, so that when said'bobbin is engagedwith the pin I l and slid downwardly over said sleeve or bushing B, thelatter is slightly compressed and, by its constant tendency thereafterto expand, acts to retain said bobbin frictionally and firmly, yet readyovably, on said pin 1 I, as well as against 3 any rotary or sidewisemovement relative thereto.

If desired, but not necessarily, the upper end of the pin Il may beprovided with a head IA of spherical or other suitable shape and of adiameter to neatly fit the opening l 3 of the bobbin B to assist thesleeve or bushing B in holding said bobbin against tilting relativeto'the pin H. The head I4'may be formed as an integral part of the pin II or may be separate from said pin, in which latter event it may beprovided with a bore I5 of limited depth and of approximately the samediameter as the pin II to adapt it readily to be applied to the upperend portion of said pin and to be frictionally retained thereon. Ifformed as an element separate from the pin I I, the head Id may be ofmetal or of any other suitable material.

If the pin H is provided with a head l4 the sleeve or bushing B may beof short length. If, on the other hand, the pin I I is not provided witha head I4, the sleeve or bushing B is of sufiicient length to act aloneto hold the bobbin B against tilting relative to said pin.

As illustrated in the drawings, the sleeve or bushing B is of suiiicientlength to adapt it to act alone to hold the bobbin C against tiltingrelative to the pin l l whether said pin is or is not provided with thehead I4. Moreover, the drawings illustrate that throughout the medialportion of its length said sleeve or bushing is of lesser diameter thanthe diameter of the opening IS in the bobbin B so as to have clearancefrom the latter. Thus, only the upper and lower head and base portionsI6 and II, respectively, of the sleeve or bushing have holdingcooperation with the bobbin and as a result it is easier to apply thebobbin to and to remove it from said sleeve or bushing than would be thecase if the sleeve or bushing had engagement and holding cooperationthroughout its length with the bobbin.

To facilitate compression of the head It by the bobbin B, said head maybe longitudinally grooved as indicated at I8. If desired, the base Ilmay be grooved in the same manner for the same purpose.

The bobbin C is provided at its lower end with diametrically oppositerecesses l9 to adapt it to be clutched to a driving mechanism, and whensaid bobbin is engaged on the pin l I these recesses I9 may receive thepin tray cross wire IE on which the pin I I is mounted, whereby thebobbin is held positively against rotation relative to said pin. In thisconnection, the lower end portion of the opening I3 in the bobbin C is,as usual, enlarged as indicated at 28. Accordingly, the base portion I!of the sleeve or bushing B is formed to fit and to have holdingcooperation with the said enlarged lower end portion 20 of said openingI3. Moreover, said base portion ii is provided with diametricallyopposite recesses 2| to receive the cross wire Ill of the pin tray.Thus, not only is said base portion adapted to extend substantially tothe bottom of the cross wire I ll for holding cooperation with thebottom part of the enlarged lower end portion 26 of the bobbin openingI3, but the entire sleeve or bushing is adapted to be held positivelyagainst rotation relative to the pin II because of engagement of thecross wire II! in said recesses 2 I.

Should the pin tray be of a type in which the pin ll rise from crossmembers in the form of flat strips or the like, which is common, thelower ends of the sleeves or bushings B and the bobbin C obviously willsimply rest upon such flat strips and the base portions I! of thesleeves or bush- 4 ings still will fit and have holding cooperation withthe enlarged lower end portions 20 of the bobbin openings I 3.

Referring now to the sleeve or bushing of alternative form illustratedin Figs. 4 and 5 of the drawings and designated generally as B, it ispointed out that the same may be formed from sheet metal or othersuitable sheet material and includes a neck portion 22 to receive thepin II and spring fingers 23 to be received in the opening I3 of thebobbin C.

The neck portion 22 is of an internal diameter to adapt it to be forcedon the pin I I and to be frictionally and firmly held thereon, and thespring fingers 23 are collectively of a normal diameter somewhat greaterthan the diameter of the bobbin opening l3 so by the act of forcing thebobbin over them they are sprung inwardly and by their constant tendencythereafter to spring outwardly frictionally and firmly hold the bobbinupon the pin H. To provide the spring finers 23 the sleeve or bushing Bmay be formed with a longitudinally slitted bulbous portion as shown, orsaid fingers may be provided in any other suitable or desired manner.

Summarizing, it will be seen that there has been provided simple,practical means for effectively holding bobbins upon the pins of pintrays against the possibility of their accidental removal therefrom andagainst tilting, sidewise, rotary or other movements relative theretowhich might result in sloughing olf of yarn from the bobbins.

If desired, two of the sleeves or bushings B or B may be used in lieu ofa single such sleeve or bushing or in lieu of a single such sleeve orbushing and a head such as the head M, in which event one of the sleevesor bushings may be located at or near the bottom of the pin I I and theother may be located at or near the top of said pin. Moreover, whether asingle or a pair of sleeves or bushings is or are used in any particularinstance, it is not essential that the same be formed for frictionalholding engagement with the pin I I. On the contrary, the same may becemented, welded, soldered, riveted or secured to the pin II in anyother suitable or desired manner.

From the foregoing description considered in connection with theaccompanying drawings, it is believed that the invention will be clearlyunderstood and its advantages appreciated. It is desired to point out,however, that while only certain specific structures have beenillustrated and described, the invention may readily be embodied inspecifically different structures within L its spirit and scope asdefined in the appended claims.

I claim:

1. The combination of a bobbin holding pin tray including a cross wireor rod having a bobbin holding pin secured at its lower end thereto andrising therefrom, a bobbin having an axial bore to receive said pin andfurther having diametrically opposite recesses in its lower end portionto receive said cross wire or rod to positively hold the bobbin againstrotation relative to the pin, and a sleeve or bushing engaged on thelower end portion of said pin and adapted to enter and to neatly fit thelower end portion of the bore in the bobbin to hold the bobbin againstsidewise movement relative to said pin, the lower end of said sleeve orbushing having therein diametrically opposite recesses wherein theportions of the cross wire to either side of said pin are disposed.

2. A sleeve or bushing to be engaged on a pin of a bobbin holding pintray and to fit closely in the axial bore of a bobbin engaged on the pinto hold the bobbin firmly engaged. with the pin, said sleeve or bushingbeing formed from inherently resilient material and having an axial boreof slightly lesser normal diameter than the diameter of the pin to adaptit to engage frictionally and tightly with the pin when forced thereon,the end portions of said sleeve or bushing having normal externaldiameters slightly greater than the diameter or" the bore of the bobbinto adapt them to be compressed by forcing of the bobbin over the sameand thereby to act effectively to hold the bobbin firmly on the pin, theportion of said sleeve or bushing between the said end portions thereofbeing of lesser external diameter than the diameter of the bore of thebobbin.

3. The combination of a bobbin holding pin tray including a cross Wireor rod having a bobbin holding pin secured at its lower end thereto andrising therefrom, and a sleeve or bushing of inherently resilientmaterial engaged on the lower end portion of said Din and adapted toenter and to snugly fit the lower end portion of the bore in a bobbin orquill to hold the latter against sidewise movement and rotation relativeto said pin, the lower end portion of said sleeve or bushing havingrecesses wherein said cross wire or rod is disposed.

4. A sleeve or bushing of inherently resilient material to be engagedtightly over the lower end portion of a pin of a pin tray and to snuglyfit the lower end portion of the bore of a bobbin or quill to hold thelatter against sidewise movement and rotation relative to the pin, saidsleeve or bushing having in its lower end recesses to accommodate across wire or rod of a pin tray.

5. A sleeve or bushing of inherently resilient material to be engagedtightly over a pin of a pin tray and to snugly fit the bore of a bobbinor quill to hold the latter against sidewise movements and rotationrelative to the pin, said sleeve or bushing having top and bottomportions to snugly fit the bore of a bobbin or quill and between itssaid top and bottom portions being of a diameter less than the diameterof the bore of a bobbin or quill so as to have clearance from thelatter, at least one of said portions having recesses therein to permitthe same readily to be compressed by a bobbin or quill engagedthereover.

6. A sleeve or bushing of inherently resilient material to be engagedtightly over a pin of a pin tray and to snugly fit the bore of a bobbinor quill to hold the latter against sidewise movements and rotationrelative to the pin, said sleeve or bushing having top and bottomportions to snug- 1y fit the bore of a bobbin or quill and between itssaid top and bottom portions being of a diameter less than the diameterof the bore of a bobbin or quill so as to have clearance from thelatter.

7. A sleeve or bushing as set forth in claim 5 in which the bottomportion of the sleeve or bushing has therein recesses to accommodate across wire or rod of a pin tray.

GEORGE MCGEE.

REFERENCES CITED following references are of record in the this patent:

UNITED STATES PATENTS The file of

